How to extract a specific value from Json response and use this value in the input payload json file in Rest Assured Automation Testing - api

Question

I am not using any POJO Classes. Instead i am using External json file as payload file for 2 of my API's (Get API and Delete API).
Add API >> Adds the book name, book shelf, other book details along with unique place_id.
Delete API >> Used to delete a book from specific rack using the unique place_id from above.
Since I am using external json payload input file, please let me know the way to pass the "place_id" grabbed from GET API and send this place_id to DELETE API external json file and then use it
Add Place API below: This API returns unique Place_ID in the response
{
"location": {
"lat": -38.383494,
"lng": 33.427362
},
"accuracy": 50,
"name": "Frontline house 1",
"phone_number": "([phone]",
"address": "2951, side layout, cohen 09",
"types": [
"shoe park",
"shop"
],
"website": "http://google.com",
"language": "French-IN"
}
Delete Place API below:
{
"place_id": "<need to insert place_id from above response>"
}

Answer 1

You can do this using json-simple library in java. json-simple maven repository
imports
import io.restassured.RestAssured;
import io.restassured.path.json.JsonPath;
import io.restassured.response.Response;
import org.json.simple.JSONObject
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
You have to get to the following;
Retrieve place_id from Add Place API json response
Read request body of Delete Place API from json file
Replace the place_id value in request body of Delete Place API
Write the new request body to Delete Place API json file
// Retrieve place_id from Add Place API json response
Response response = RestAssured
.when()
.get("add_place_api_url")
.then()
.extract()
.response();
JsonPath jsonPath = response.jsonPath();
String placeId = jsonPath.get("place_id");
// Read request body of Delete Place API from json file
JSONObject jsonObject = new JSONObject();
JSONParser parser = new JSONParser();
try {
Object obj = parser.parse(new FileReader("path/DeletePlaceRequestBody.json"));
jsonObject = (JSONObject) obj;
// Replace the place_id value in request body of Delete Place API
jsonObject.replace("place_id", placeId);
} catch (IOException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
}
// Write the new request body to Delete Place API json file
try {
FileWriter file = new FileWriter("DeletePlaceRequestBody.json");
file.write(jsonObject.toString());
file.flush();
file.close();
} catch (IOException e) {
e.printStackTrace();
}